"When it comes to climate change, true skepticism is two-sided. One-sided skepticism is no skepticism at all." —Michael Mann.

"I will call people who deny the science 'deniers.' I won't be deterred by the fact that they don't like the use of that term and no doubt that just endears me to them further. It's frustrating of course because a lot of us would like to get past this nonsensical debate and on to the real debate to be had about what to do."

‘The science behind the greenhouse effect was simple enough to have been widely understood by the mid 19th century, when the light bulb and the telephone and the automobile where being invented – and not the atomic bomb or the iPhone or the space shuttle. The greenhouse effect isn’t rock science.’ – Nate Silver, author of The Signal and the Noise, page 376.

"It should be possible to write about science in plain English, though asking a scientist to do that is like asking a cat to bark."— Dr. Richard Somerville, Scripps Institution of Oceanography, Coordinating Lead Author of the IPCC's Fourth Assessment Report.

"Responsibility is a big Republican theme. Why should we not take responsibility for what we are collectively doing to the climate system?" — conservative Republican MIT climate scientist Dr. Kerry Emanuel

'When you focus on just atmospheric heat to measure global warming, it's like tracking the tip of your dog’s tail to determine its location, instead of the body of the dog.' — Greg Laden, biological anthropologist and science communicator.

"I do not want the government telling me what to do. But, the longer we wait, the worse this problem gets...then you are going to see a lot of government interventions that you do not want to see at all." — Naomi Oreskes.

"Unfortunately, the focus remains mostly on “global warming” instead of on the bigger concern—that we are disrupting the planet’s climate in completely unpredictable ways." — Ajit Varki and Danny Brower, writers of the 2013 book, "Denial: Self-Deception, False Beliefs, and the Origins of the Human Mind."

“Climate is the canvas and weather is what is painted on it. Humans have changed the climate so now all weather is affected by us.” – Scott Mandia, Professor of Physical Sciences at Suffolk County Community College in Long Island, New York.

"(Climate Change) is ultimately an argument of humans vs. physics. It is not Republicans vs. Democrats, liberals vs conservatives, or environmentalists vs. industry. This issue is about whether the planet can live compatibly with our complex human brains." - Bill McKibben, climate activist and founder of 350.org

"Climate change has taken on political dimensions...That's odd because I don't see people choosing sides over E = mc2 or other fundamental facts of science." — Dr. Neil deGrasse Tyson, astrophysicist, Host of Cosmos: A Spacetime Odyssey.